150 Important Electrostatics and Capacitance MCQ Question and Answer | PDF Free Download
1.The value of dielectric constant for vacuum is taken as
- AZero
- B1
- C4
- D10
2.Which of the following capacitor is marked for polarity?
- AAir
- BPaper
- CMica
- DElectrolytic
3.Which of the following capacitors can be used for temperature compensation?
- AAir capacitor
- BCeramic capacitor
- CPaper capacitor
- DNone of the above
4.Which of the following statements is incorrect?
- AThe thinner the dielectric, the more the capacitance and the lower the voltage breakdown rating for a capacitor
- BA six dot mica capacitor colour coded white, green, black, red and yellow has the capacitance value of 500 pF
- CCapacitors in series provide less capacitance but a higher voltage breakdown rating for the combination
- DA capacitor can store charge because it has a dielectric between two conductors
6.Which of the following capacitors is usually preferred for closer tolerances?
- APaper capacitor
- BMica capacitor
- CCeramic disc capacitor
- DNone of the above
7.The dielectric constant (relative permittivity) of a glass is given by
- A0.1 to 0.4
- B0.5 to 1.0
- C2.0 to 4.0
- D5 to 100
8.????capacitors are mainly used for radio frequency tuning.
- APaper
- BAir
- CMica
- DElectrolytic
9.???.. capacitors can be used only for D.C
- AAir
- BPaper
- CMica
- DElectrolytic
10.???.. capacitors are used in transistor circuits
- ACeramics
- BPaper
- CAir
- DElectrolytic
11.????? capacitors are used for audio frequency and radio frequency coupling and tuning.
- AAir
- BMica
- CPlastic film
- DCeramic
12.The inverse of capacitance is called
- AReluctance
- BConductance
- CSusceptance
- DElastance
13.When the dielectric is homogeneous, the potential gradient is
- AUniform
- BNon-uniform
- CZero
- DAny of the above
14.The potential gradient across the material of low permittivity is ??. than across the material of high permittivity
- A Smaller
- BGreater
- CBoth (a) and (b)
- DNone of the above
15.???. Fields is associated with the capacitor.
- AElectric
- BMagnetic
- CBoth (a) and (b)
- DNone of the above
16.A capacitor having capacitance of 5 ?F is charged to potential difference of 10,000 V. The energy stored in the capacitor is
- A50 joules
- B150 joules
- C200 joules
- D250 joules
17.An equipotential surface is one which has all points at ________ potential.
- ASame
- BDifferent
- CZero
- DNone of the above
18.The total deficiency or excess of electrons in a body is known as
- ACurrent
- BVoltage
- CPotential gradient
- DCharge
19.The relative permittivity has the following units
- AF/m
- Bm/F
- CWb/m
- DNo units
20.The direction of the lines of force at any point is the direction along which a unit _______ charge placed at that point would move if free to do so
- APositive
- BNegative
- CBoth of the above
- DNone of the above